ARP 8740 Chrome Moly Washers Set Of 10 GENUINE ARP MADE IN THE USA !!! Part Number : 200-8688 Specs : Inside Diameter : 3/8" Outside Diameter : .875" Thickness : .150" Chamferred OUTSIDE DIAMETER Washers Made From 8740 Chrome Moly Steel Black Oxide Treated 8740 Chrome Moly Steel See Our EBAY STORE For More ARP and Other ENGINE And PERFORMANCE Items